Self-adapting method for filtering image with edge being retained
An image filtering and adaptive technology, applied in the field of image processing, can solve the problem of loss of image detail information, and achieve the effect of maintaining image detail information, removing noise, and easy target recognition and tracking.
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[0022] The present invention will be further described now in conjunction with accompanying drawing:
[0023] Figure 2(a) is the original noise-free Lean image, and Figure 2(b) is the noisy image after adding salt and pepper noise with an intensity of 0.2 and Gaussian noise with a mean of 0 and a variance of 16 to Figure 2(a).
[0024] a) Use the extremum method to detect pixels polluted by salt and pepper noise in the noise image;
[0025] Suppose y is an image polluted by mixed noise. For a central pixel (i, j) in a certain detection window, if the gray value of the pixel is the maximum or minimum value in the window, it is considered that the pixel is affected by For salt and pepper noise pollution, set the value of the corresponding position in the noise marker matrix flag to 1, that is, flag(i, j)=1; otherwise, it is considered that there is no noise pollution, and set fag(i, j)=0;
[0026] b) Use the adaptive filter method to correct the gray value of the polluted pixel...
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